<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var num = 10

        console.log(num) // 
        alert("刷新了 awa")
        document.write('哈喽哈') // 刷新了

        console.log(typeof num) // 10  刷新了
    </script>
    <script src="./mygo.js"></script>
</body>
</html>